Guitar controller



FIG. 1 is a front perspective view of the guitar controller;

FIG. 2 is a front view of the guitar controller;

FIG. 3 is a rear view of the guitar controller;

FIG. 4 is a bottom view of the guitar controller;

FIG. 5 is a top view of the guitar controller;

FIG. 6 is a right side view of the guitar controller; and,

FIG. 7 is a left side view of the guitar controller.

The broken lines of the drawing are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a guitar controller, as shown and described. 